Anybody running SU on the new 4.0Ghz iMac or the Boxx Apexx2?

Curious to know what the performance is on this machine. Need to get a new box at our office. New iMac i7 or Boxx Apexx2 are the choices. Any input appreciated.

I know its not one of your two choices, but i just got a new cyberpower pc with the i7 4790k, 32 mb ram, and gtx 980 and it runs great.